router: call CleanStore on startup

routing/mock_test.go

@@ -72,6 +72,9 @@ func (m *mockPaymentAttemptDispatcher) GetPaymentResult(paymentID uint64,
 	return c, nil
 
 }
+func (m *mockPaymentAttemptDispatcher) CleanStore(map[uint64]struct{}) error {
+	return nil
+}
 
 func (m *mockPaymentAttemptDispatcher) setPaymentResult(
 	f func(firstHop lnwire.ShortChannelID) ([32]byte, error)) {
@@ -187,6 +190,10 @@ func (m *mockPayer) GetPaymentResult(paymentID uint64, _ lntypes.Hash,
 	}
 }
 
+func (m *mockPayer) CleanStore(pids map[uint64]struct{}) error {
+	return nil
+}
+
 type initArgs struct {
 	c *channeldb.PaymentCreationInfo
 }